Displaying Which Packages Got Updated Last with pacman -Syu?

garchws · 2017-01-20 16:11:46

A recent system update recently destroyed a project I was working on (I'm assuming some dependency got swapped and I cannot track it down). In order to update the system, I either used:

yaourt -Syu
pacman -Syu

(I cannot remember which).

Question: Is there some log on my system which displays which packages got updated last using those commands?

Scimmia · 2017-01-20 16:14:30

/var/log/pacman.log

garchws · 2017-01-20 16:31:15

@Scimmia: That is perfect.

Do you know if there is a way to systematically reverse a system upgrade, perhaps by using the contents of /var/log/pacman.log?

Trilby · 2017-01-20 16:31:43

For a quick list of what was upgraded by the last full system upgrade:

tac /var/log/pacman.log | sed -n '/full system upgrade/q;s/.*\[ALPM\] upgraded //p'

To downgrade, see the wiki. Always search the wiki before asking, answers to most questions can be found there.

c00ter · 2017-01-21 01:56:38

Trilby wrote:

For a quick list of what was upgraded by the last full system upgrade:
tac /var/log/pacman.log | sed -n '/full system upgrade/q;s/.*\[ALPM\] upgraded //p'
To downgrade, see the wiki. Always search the wiki before asking, answers to most questions can be found there.

And people wonder why we love Arch? It's the Moderators!

Regards,
And apologies for adding superfluous fluff...

TheChickenMan · 2017-01-21 19:09:14

Trilby wrote:

For a quick list of what was upgraded by the last full system upgrade:
tac /var/log/pacman.log | sed -n '/full system upgrade/q;s/.*\[ALPM\] upgraded //p'
To downgrade, see the wiki. Always search the wiki before asking, answers to most questions can be found there.

This is really useful. I'm going to alias this to something. Maybe this should be put in the wiki somewhere?

Trilby · 2017-01-21 20:02:27

Feel free to add it. But note that it is far from foolproof. If you run updates frequently enough (as I do) that there is often nothing to update, this line will return nothing. It is literally what was updated in the last attempted system upgrade, not what was updated the last time there was something to update.

Also to be more readable, it might be good to switch the order of the two sed commands.

TheChickenMan · 2017-01-21 20:36:25

Trilby wrote:

Feel free to add it. But note that it is far from foolproof. If you run updates frequently enough (as I do) that there is often nothing to update, this line will return nothing. It is literally what was updated in the last attempted system upgrade, not what was updated the last time there was something to update.
Also to be more readable, it might be good to switch the order of the two sed commands.

This is a good point. I've always just looked manually at the log when I really needed to know. Thankfully updates don't cause problems too frequently. Maybe I'll add this to my list of rainy day projects though, to write something more reliable. It would be nice to have a reliable pacman log parser.

Arch Linux

#1 2017-01-20 16:11:46

Displaying Which Packages Got Updated Last with pacman -Syu?

#2 2017-01-20 16:14:30

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#3 2017-01-20 16:31:15

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#4 2017-01-20 16:31:43

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#5 2017-01-21 01:56:38

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#6 2017-01-21 19:09:14

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#7 2017-01-21 20:02:27

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

#8 2017-01-21 20:36:25

Re: Displaying Which Packages Got Updated Last with pacman -Syu?

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